（Python + micro python）树莓派pico示波器

一、示波器软件（电脑端）

from serial import *
import matplotlib.pyplot as plt
import time

#########   端口设置   ###########
PORT = "COM7"
##################################
print("Loading...")
x_points = ["0"]
y_points = ["0"]
t_0 = time.time()   #新建时间戳

plt.plot(x_points,y_points)

ser = Serial(PORT,9600)     #波特率默认9600
while True:
    line = ser.readline().decode('utf-8').rstrip()      #获取串口信息
    t_1 = time.time()
    x_points.append(round(t_1 - t_0,2))
    y_points.append(line)
    print(line)
    nac = round(t_1 - t_0,2)         #时间差
    plt.clf()
    plt.plot(x_points,y_points)
    plt.xlim(nac - 3*len(x_points),nac + 3*len(x_points))   #波形图x轴取值
    plt.pause(0.01)

ser.close()
plt.show()

二、main.py（树莓派pico端）

from machine import *
from utime import *

ADC_0 = ADC(26)
#ADC_1 = ADC(27)
#ADC_2 = ADC(28)
logicIO = Pin(16,Pin.IN,Pin.PULL_DOWN)
ExitPin = Pin(15,Pin.IN,Pin.PULL_DOWN)
led = Pin(25,Pin.OUT)

led.value(1)
def ShowWave():
    while True:
        res_u16 = ADC_0.read_u16()
        res = res_u16 * 3.3 / 65535
        print(res)
        sleep_ms(200)
        if ExitPin.value() == 1:
            break

        
def ShowLogic():
    while True:
        print(logicIO.value())

#######################################
ShowWave()          #示波器
#ShowLogic()        #逻辑分析仪
#######################################

led.value(0)